CN-122029674-A - Article with thermal insulation properties

Abstract

The present disclosure relates generally to the field of cushioning articles, and more particularly to the field of articles having pressure management and thermal insulation properties. In some embodiments, the article is a compressible insulating foam for cushioning between cells, the compressible insulating foam comprising a silicone foam with an insulating filler. The disclosure also relates to methods of making such articles and their use in industrial applications for pressure and thermal management applications.

Inventors

• JAMES M. NELSON
• Wear in dimension A lattice this
• Ah Long R. Bieber
• Claire Hartmann Thompson

Assignees

• 3M创新有限公司

Dates

Publication Date

20260512

Application Date

20241016

Priority Date

20231017

Claims (15)

1. 1. A layer of thermally insulating polymer foam, the insulating polymer foam layer comprises A silicone elastomer, and a silicone elastomer, One or more fillers Non-fluorinated nonionic surfactant Wherein the silicone elastomer is a cured foamed polymer Wherein the polymer foam layer comprising the surfactant has a lower stress at a strain of 0.5mm/mm under stress testing than a polymer foam layer without the surfactant has a strain of 0.5mm/mm, and Wherein the density of the polymer foam layer comprising the surfactant is the same or higher under density testing than the density of a polymer foam layer without the surfactant.
2. 2. The insulating polymer foam layer of any of the preceding claims, wherein the silicone elastomer is an organopolysiloxane compound.
3. 3. The insulating polymer foam layer of any of the preceding claims, wherein the non-fluorinated nonionic surfactant is selected from the group consisting of silicone polyethers, ethylene oxide polymers, propylene oxide polymers, copolymers of ethylene oxide and propylene, and combinations thereof.
4. 4. The insulating polymer foam layer of any one of the preceding claims, wherein the polymer foam layer comprising the surfactant has a lower stress at a strain in the range of 0.2mm/mm to 0.5mm/mm than a polymer foam layer without the surfactant, and the polymer foam layer comprising the surfactant has a density at the density test that is the same or higher than the density of the polymer foam layer without the surfactant.
5. 5. The insulating polymer foam layer of any one of the preceding claims, wherein the polymer foam layer comprising the surfactant has a lower stress at a strain of 0.2mm/mm than a polymer foam layer without the surfactant, and the polymer foam layer comprising the surfactant has a density at the density test that is the same or higher than the density of a polymer foam layer without the surfactant.
6. 6. The insulating polymer foam layer of any of the preceding claims, wherein the density of the polymer foam layer is in the range of 0.18g/cm 3 to 0.45g/cm 3 .
7. 7. The insulating polymer foam layer according to any one of the preceding claims, comprising from 0.25 to 2 wt% of surfactant relative to the weight of the polymer foam layer.
8. 8. The insulating polymer foam layer of any of the preceding claims, wherein the filler is selected from the group consisting of metal hydroxides, metal carbonates, clays, microspheroidal (both organic and inorganic) ceramics, aerogels, and combinations thereof.
9. 9. The insulating polymer foam layer of any one of the preceding claims, wherein the filler is selected from the group consisting of aluminum hydroxide, calcium carbonate, vermiculite, fumed silica, glass bubbles, and combinations thereof.
10. 10. The insulating polymer foam layer according to any of the preceding claims, wherein the filler is present in an amount in the range of 5 to 50 wt.%, based on the total weight of the insulating polymer foam layer.
11. 11. The insulating polymer foam layer of any one of the preceding claims, wherein in a thermal conductivity test, the polymer foam layer has a maximum thermal conductivity of 0.2W/mK.
12. 12. A battery module comprising the insulating polymer foam layer according to any one of the preceding claims.
13. 13. A multi-layer thermal barrier, the multi-layer thermal barrier comprising: One or more insulating polymer foam layers according to any of the preceding claims, One or more heat resistant layers disposed on the insulating polymer foam layer, Wherein the insulating polymer foam layers alternate with the heat resistant layers.
14. 14. The multilayer thermal barrier of claim 13, wherein the one or more heat resistant layers comprise insulating particles.
15. 15. The multilayer thermal barrier of claim 13, wherein the one or more heat resistant layers comprise fibers.

Description

Article with thermal insulation properties Technical Field The present disclosure relates generally to the field of cushioning articles, and more particularly to the field of silicone foam articles. In a preferred embodiment, the article is a compressible insulating foam for use as a battery buffer, the compressible insulating foam comprising a surfactant-containing silicone foam. The disclosure also relates to methods of making such articles and their use in industrial applications for pressure and thermal management applications. Background Currently, automotive electrification is one of the greatest trends in the automotive industry. In this trend, the automotive industry is mainly concerned with the propulsion of the electrical energy supplied by batteries and the development of suitable electric vehicle batteries as energy storage devices. Electric vehicle batteries are used to power the propulsion systems of Battery Electric Vehicles (BEVs) and Hybrid Electric Vehicles (HEVs). These batteries (which are typically lithium ion batteries) are designed to have high amp-hour capacity. The trend in electric vehicle battery development has turned to higher energy density (kWh/kg) in the battery to allow longer mileage coverage and reduce battery charging time. Due to the high energy density of the electric vehicle battery and the high energy flow during charging or discharging of the battery, there is a risk of hot spots and thermal runaway events forming, in which case the heat generated by the decomposition of the battery cells propagates very rapidly to neighboring cells. This chain reaction may lead to an explosion or fire of the whole electric vehicle. Furthermore, during the normal life cycle of these energy storage devices, particularly during rapid charge and discharge cycles of the electric vehicle battery, the battery cells for such battery modules tend to continuously expand and retract. These expansion/contraction cycles may subject the battery cells to considerable pressure conditions, which in turn may lead not only to mechanical damage of the battery cells, but also to complete failure of the battery module. In such a context, the use of heat pipe understanding solutions has rapidly become a way to mitigate the temperature rise in battery assemblies. Disclosure of Invention In a general embodiment, the present disclosure relates to an insulating polymer foam layer comprising A silicone elastomer, and a silicone elastomer, One or more fillers Non-fluorinated nonionic surfactant Wherein the silicone elastomer is a cured foamed polymer precursor Wherein the stress of the polymer foam layer comprising the surfactant at a strain of 0.5mm/mm under stress test is lower than the stress of the polymer foam layer without the surfactant at a strain of 0.5mm/mm, and Wherein the density of the polymer foam layer comprising the surfactant is the same or higher under the density test than the density of the polymer foam layer without the surfactant. Drawings FIG. 1-a multilayer thermal barrier (100) comprising an insulating porous foam layer (101) and optionally one or more heat resistant layers (102). Optionally, encapsulated with an organic polymer layer (106). Fig. 2-battery module 200 includes an assembly of battery cells 202. One or more insulating porous foam layers (or multiple layers of thermal barriers) 201 formed from the exemplary materials described herein may be disposed between individual cells or groups of cells at one or more locations throughout the battery module. Fig. 3-a battery pack 300 includes a plurality of battery modules 302. A series of insulating porous foam layers (or multiple layers of thermal barriers) 301 formed of the exemplary materials described herein are provided to be placed between adjacent battery modules or on top of battery modules 302. The dark rectangle indicates that a multi-layer thermal barrier is placed on top of the battery module. Alternatively, a multi-layer thermal barrier may be placed between one or more battery packs and the walls of the battery pack container (not shown). Fig. 4-comparison of insulating polymer foam layer according to the present disclosure with insulating polymer foam layer with fluorinated surfactant under Compressive Force Displacement (CFD) test. Figure 5-comparison of insulating polymer foam layers according to the present disclosure with insulating polymer foam layers with different surfactants under Compressive Force Displacement (CFD) test. Figure 6-comparison of insulating polymer foam layers according to the present disclosure with insulating polymer foam layers with different surfactants under Compressive Force Displacement (CFD) test. Fig. 7-comparison of insulating polymer foam layers according to the present disclosure with insulating polymer foam layers with different surfactants under Compressive Force Displacement (CFD) test. Figure 8-comparison of insulating polymer foam layers according to the present disclosure with